I upgraded from 2.2 to 2.3. I created a new course in Moodle 2.3 and tried to import course material into this new course from an older course I created when I was running 2.2. I got the error above.
In debug mode, I get the follow errors:
Error code: cannot_finish_ui_if_not_setting_ui
$a contents:
- line 161 of /backup/controller/backup_controller.class.php: backup_controller_exception thrown
- line 110 of /backup/util/ui/backup_ui.class.php: call to backup_controller->finish_ui()
- line 92 of /backup/import.php: call to backup_ui->execute()
The old courses aren't backing either. Any suggestions would be appreciated.